Identification and Deformation Monitoring of Potential Geotechnical Hazards in the Deqin Section of the Lancang River,China
The southeastern Qinghai-Xizang Plateau has significant topographical variations,active tectonic movements and developed glaciers and permafrost.A variety of geotechnical disasters occur frequently in this region.In order to study the distribution characteristics and movement patterns of geotechnical hazards in this region,the Deqin section of the Lancang River was selected as the research area.Based on the data form ALOS-2 satellite of one track and Sentinel-1 A satellite of three tracks,large-scale geotechnical hazards investigation in the study area were conducted using Stacking-InSAR technology,while time-series monitoring of typical debris flow source areas was carried out using DS-InSAR technology.Singular spectrum analysis(SSA)was employed to extract the periodic characteristics of deformation.The results show that there are a total of 670 deformation areas in the study area,most of which are rock glaciers located on the mountain tops of high elevations,and 27 landslides are distributed within a 5 km-distance from the Lancang River;the deformation time series of the selected typical debris flow source area from 2017 to 2022 shows a linear trend;both precipitation and temperature are correlated with the periodic deformation of the rock glacier from this source area.
InSAR technolgyrock glaciergeohazarddeformation monitoringsingular spectrum analysisLancang River
NETL
NSTL
万方数据
